American Idol judge Kara DioGuardi undid her dress and stripped down to her bikini as she performed with former American Idol contestant Katrina Darrell, who auditioned in a bikini and won a Golden Idol award for Best Attitude, during the Season 8 finale of American Idol in Los Angeles on Wednesday, May 20.

Who looked better in their bikini on the American Idol season finale? Idol judge Kara or “Bikini Girl” Katrina?